linux-kernel - Re: [PATCH 0/2] extcon: Intel Cherry Trail Whiskey Cove PMIC and external charger tweaks

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Date:   Fri, 15 Feb 2019 16:08:23 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Yauhen Kharuzhy <jekhor@...il.com>, linux-kernel@...r.kernel.org
Cc:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH 0/2] extcon: Intel Cherry Trail Whiskey Cove PMIC and
 external charger tweaks

Hi Yauhen,

You are missing me on cc list. I didn't know this patchset.
On next, please use the get_maintainer script in order to
send the correct list.

On 19. 2. 11. 오전 5:36, Yauhen Kharuzhy wrote:
> At implementation of charging support for Lenovo Yoga Book (Intel Cherry Trail
> based with Whiskey Cove PMIC), two pitfalls were found:
> 
> - for detection of charger type by PMIC, bit 6 in the CHGRCTRL1 register
>   should be set in 0 (and set to 1 for Host mode). Pick up its definition
>   and logic from from Intel code drop[1];
> 
> - "#CHARGE ENABLE" signal of external charger (bq25892) in Yoga Book is
>   connected to one of PMIC outputs controlled by CHGDISCTRL register.
>   Enable charging at driver initialization. Pick up this from Lenovo's code
>   drop[2,3].
> 
> Please keep in mind that I have no docs for Whiskey Cove PMIC, so this patches
> are based on some kind of reverse engineering and suppositions, correct me if
> this semantic is wrong for common case.
> 
> [1]. https://github.com/01org/ProductionKernelQuilts/uefi/cht-m1stable/patches/0001-power_supply-intel-pmic-ccsm-driver.patch
> [2]. https://github.com/jekhor/yogabook-linux-android-kernel/blob/b7aa015ab794b516da7b6cb76e5e2d427e3b8b0c/drivers/power/bq2589x_charger.c#L2257
> [3]. https://github.com/01org/ProductionKernelQuilts/uefi/cht-m1stable/patches/EM-Charger-Disable-battery-charging-in-S3-and-enable.patch
> 
> Yauhen Kharuzhy (2):
>   extcon-intel-cht-wc: Make charger detection co-existed with OTG host mode
>   extcon intel-cht-wc: Enable external charger
> 
>  drivers/extcon/extcon-intel-cht-wc.c | 71 +++++++++++++++++++++++++++-
>  1 file changed, 70 insertions(+), 1 deletion(-)
> 


-- 
Best Regards,
Chanwoo Choi
Samsung Electronics